The members of the Birdwatching Club are studying the different kinds of birds and the changes in their numbers.
观鸟俱乐部的成员们正在研究不同种类的鸟以及它们数量上的变化。
This year, members of our Birdwatching Club are studying the different kinds of birds in Zhalong and the changes in their Numbers.
今年我们观鸟俱乐部的正在研究扎龙地区的各种鸟类及它们的数量变化。
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